Mechanical movement.



A. J. PORTESGUE;

MECHANICAL MOVEMENT.

v APPLICATION FILED JAN. 31, 1913. 1,1 1 ,5 Patented Sept. 22, 1914 4 sums-51mm 1'.

es" I uemiafl A. J. FORTESGUE. MECHANICAL MOVEMENT APPLICATION rum) JAN. a1, 1913.

Patented Sept. 22, 1914.

4 BHBETS-8EEET 2.

fizvezvfafl a? Z Z67 7]. [ar ues cue IHE NOR'RIS PETERS CO.. PHOTO-LITHD. WASHINGTON, D. C.

A. J. FORTESGUE. MECHANICAL MOVEMENT. APPLICATION IILED JAN. 31, 1913.

Patented Sept. 22, 1914.

4. SHEETS-SHEET 3.

Wa%1ze66 6-5 I m 6. mam.

wfiarney,

THE NORRIS PEYERS CO. PHOTOI-LITHOU WASHING TUN I) c.

Patented Sept. 22, 1914.

4 SHEETSSHEHT 4.

Evert/ "0 ffjzj 5 QZZQT' ZJlrieeczde THE NORRIS PETERS CO.. PHOTOLITHO.. wAsHlNGmN. U. u.

UNITEDSTAIES A E F l E- ALBERT JOHN ronzrns one, or anivcnrrrn;nnAnsYnnEY, nnwvsou'rn WALES, f

i irfcnnnrcan, MOVEMENT.

y 1 Application 11166. January 31, 1913. Serial No. 745,474. 1 l

Thrill whom it may @babem: I a "Be it known that I, ,ZALBERT JOHN FOR "i'nsonrl, asubject of the King; vof Great Britainyvresiding; atArnclifie, neanySydney, in the Y State of "New South =.Wales, -C0m* monwealth of Australia, have "invented certain new and usefullmprovenients Mechanical Movements, of which the; following is a specification. 1 1' 13:, mlhisfinventi'on. relates; to" mechanical movements,v and more particularlytzto:vari

able "gearing; and" it proposesIan-"improved' gearing which is primarily designed: for.

application :to"windmills,"for the urpose of utilizing an increase in wind orcecto' transmit more power too the pitman rod 1 and thusr -obtainwgreater efiiciency; instead of 1 tending to rprematurely throw or veer the wind-wheel gradually out oi operation. According to. the invention thelvariatifon in the. force or power transmitted is effected through 1 the operation of a comparatively 1 whole beingcarriedona rocking slide lever small subsidiary wind I -wheel. .This sub sidiary wheel is ;'suitably" geared to a: shaft having a screwthread on which aithreaded' pillar carrying a slide is capable 0f travel ing on rotation of the subsidiary wheel, the

arm fulcrumed to an upright-or frame rigidly secured tofthe niill head piece. 1 *With this slide is pivotally connected an adjustablearmlor' rod' which-again iszpivoted to a rocking arm also fulcrumed to the-ups right or frame above the rocking slide lever arm; The shaft of the-subsidiary wheel is provided with a '-suitable tension device, such as a coiled spring-or weight so that the tension thereof has firststo. begovercome a before the wheel: cane: Brotat'e. I "The main wind wheel gearingcislcoupled to therock= ing slide lever arm preferably byneans of! azcrank rod and in, .Ilaprefertoruse an endless chaini'anditwoz sprockets, the chain: being driven'zby -a sprocket on thepmain" 1 wind. Wheel shaft carrying" the crank rod and pin.r-: The crank rod engages :with the rocking slide lever arm. at' the end near Fthe pitinan' rod; oscillating same Ito: efi'ect'fre cipro'catioiiof thepitn' an rod which is pivoted V w the aforesaid} upper rocking arm., l.

The tension of the subsidiary wheel -ris so .regu-lated that. a moderate .wind v force wheel ":revolved; to rotate the screw :sl'l'aft,

jand thezadjustable rodto take up'a more VlthlCiLl position with respect; to :it. -The greater" the wlnd force on the subsidiary the pitman rod and consequently a proportionately longer stroke is'transmi'tted to it. When the wind fo'rceon the subsidiary 'wheel is reduced, the tension onthe shaft rod may be pivoted to -:the end of the pitman position of which fulcrum will VaryL-in ac cordan'cerwith the wind force. 7 Bvutin order that the invention may be clearly comprehended,-I" will now refer to the drawings herewith; in'which, "1" t v Figure. 1 is ageneral perspective view illustrating a windmill provided with my improvements. Fig. 2 is anenlarged perspective viewshowing the variable gear: ing.. -Figs.13, 4: and 5, are enlarged detail views. Figs. 6 and 7 areelevations,':partlv insection, showing the variablergearin different positions, the-arrows indlcating the extreme variations in the throw of the pitman r-rod. Fig: 8is a similar view ofa modification, illustrating the position of the ad justable arm or rod and pitmanrodUina normal windw H The same numerals indicate like parts. i

1Q lrepresents the tower of a windmill provided with the usual head 11 arranged to Trevolve in the tower cap 12 in suitable bearingsuand carrying the gearing to .ob-

tainreciprocat-ion of the pitmanrod 36. I: have shown chainwand sprocket gearing 13-? provided with the crank .or :wrist pin 14 and-crankrod 15. a

:16 is zthe'pvshaft of the main wind wheel, The reciprocating gearingfof the'main ,wind wheelmay he ofany" type "but I' preferthat gearcase; 17 and .providedpreferably with automatic lubric'atorsk The crankarm 18 to. the rocking slide lever: arm, 19 .fulcrumed tofthe frame- 20 which is, secured to the L gear case or millnlhead piece, 11 Carried patents septl zz, 19 14.

wheel, the farther the slideis forced. toward As Ya modification the adjustable arm: or

rod} and be. provided with a friction wheel wh ch' bea'rs against a rigidwupright' form lng an:.ad ustable fulcrum for the rod, the

shown the; wholebbeing bset in a suitable t on the upper-rend of rod '15 is connected hasilittle' efiect thereon; l butgio'n an increase I I of :forcethe .tensionwis overcome andgthe forcing: the slide toward the pitman rod 5 screw shaft 24 rotatable in suitable bearings and provided with a sorew'nutQficonnected to pillar or post 26 which in turn is connected to the slide 27 capable oi traveling along the arm 19' on rotation of th wheel 22.

f I may-use skew'bevel, rack and pinion or other suitable gearing but I findwthat the screw gearing is best adapted to resist the consequent back thrust which takes place on the-up stroke when the adjustable armor rod 281-is at a slopingangle. The end of the slide 27 adjacent. the pitman rod 36 has piv oted thereto the arm 28 which again is pivoted to. a rockingarm29 fulcrumed to'the 211- 19.- On the: shaft 30 of the wind Wheel 22 is a guide reel 31 to which is fixed a flexible element 32, here shown as a rope which travels over a guide roller-33. or the like, and has suspended from it a suitable weight 34 or other device for obtaining the necessary tensions The. weight is preferablydisposed in aFguide. pipe 35 or in some. other suitable.

manner. 30' 37s isv a. fixed balancing vane to maintain the face of themain wind wheel 40 to-the wind-as described. The usual hinged tail vane-4:1. is also provided, but it is arranged so that it willnot veer out ofthe vwind so readily as in the usual windmill. 1

In operation, whcnthe windiorce is suflicient to overcome the weight 34 or other tension device on revolution of the wind wheel 22, the rope 32 is wound. upon itself on the guidereel 31, each revolutionrequiring greater-wind force' t'o raise the weight (or to? put more tension on the tension device): Whenthe wind force diminishes, the a weight. descends, causing reversal of the andthe power of the main windwheel is greatly increased by reason of the back leverage, the travel of thepitman rod and eonsequentlythat of the pump rod being less for each revolution of the mainwwheel a o-wthe pitman ro d remains the same. per

revolution of the mainwind wheel. The

.65 side movement ofthe pitman rod varies very frame 20 above the'rocking slide lever arm wheel 22 accordingly. As the wheel raises is: broughtback to an angle of about than when the adjustable arm is about thelittle from the vertical considering the'great vvariation inthe length of its stroke.

In Fig. 8 the-adjustable arm. 28: i'slpiv'oted. to the pitman rod 36 and carries the friction Wheel 42 vwhich bears against the-channel ex-- tension 43 of thesframe 20,

able fulcrum thereon.

let represents a guide for the pitma-n rodi The positions which the adjustable arm maytakeup are similar torthose shown infull and dotted lines Figs. and 7.; In-this form the pitman rod has an absolutely verticaltravel" v, ,1 [Although I have illustrated the inventionas 1 applied to 2LT; windmill driven. through chain and sprocket gearing I. would. have it understoodthatl do not restrict myself to any particular-l1manner of, isoill'ating'fthe,

rocking slidelever arm, :5,

.It w-ifllbe evidentit "at instead afflpivoting the adjustable arm or rod to the slide :12 may 1 pivot-it directlyto journals; on thetravelin'g 3 nut of the'screw which. case suitable j friction. wheels; or other bearing devicesg are.

5 provided. .li;

obtaining a varii InIn a mechanism charactenspeci:

rocking inemhen a. reciprpcatory. driven" member, a device connected with said drivv 7 ing member .forE'norinalily exertingtension thereon; a member sli'dable upon said rock? i-ng member and "connected'with; said driving member" for.raetuationfthereby; and aprdd; carried by saids-slidabl'e; member and con-v necting thesamevand said-driven'member,

for. reciprocatingthe lattenrwhereby the movement. or said slidableimember wilL var the angular 'position of said rod. relative tol said driven member to. adjust atheistroke thereof; r a s 2.. In a mechanism ofthe character spoified,.'the combination, with a rocking memher, and .operatingameans theref0r ;.:of .a'

rotaryfdrivmg member mounted upon said I l i I rocking'vmembenr a: -reciprocatory' driven membergi a threaded shaft" and a slide mounted onsaiil rocking member; gearing- "connecting said s'haftiandisaid' driving memberrar traveling member mounted on said shaft. and connected to said slide. for shifting the slide during the manner said I shaft; and p a pivotally-mounte'd" rod carried by saidvslide and [connecting the same and Ina me hanism of the: character specij fied, the eombinatiomwith omamzramr driving memberya' rockingilever, and conneot-icns between said. mainFdriWing member said drivenxmembenzf or reciprocating the -la=tter,'whereby the movement'of said slide movementof said slidable member will vary the angular position of said rod relative to said driven member to adjust the stroke thereof. y

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ALBERT JOHNFORTESCUE Witnesses: a

CHARLES E. GRAHAM,

HENRY W. CLARKE.

and said lever for operating the latter from the former; of a reciprocatory driven member toward whichs aid lever extends; a subsidiary rotary driving member mounted on 5 said lever; a member'slidable on said lever toward and fromsaid driven member and connected with the subsidiary driven-member for actuation thereby; and a rod carried by said slidable member and connecting the 10 same and said driven member for reclproeating the driven member, whereby the five cents each, by addressing the Commissioner of Patents,

Copies of this patent may be obtained for v v Washington, D. 0. a 

